Stable checkpoint — Order/Product/OrderLine foundation + common SHA aligned Includes : - Product entity (V7 migration + JPA + minimal CRUD) - Order entity (V8 migration + JPA + minimal CRUD) - OrderLine entity (V9 migration + nested controller) - Common submodule bumped to 3e7acba (bump-common-everywhere.sh + ADR-0055) Post-merge main pipeline #2480584002 green at 15:52.